Upwardly opening safe



1943- I c. T. BOLZIGHTON ET AL 2,335,232

UPWARDLY OPENING SAFE Filed Jan. 10, 1942 7 Sheets-Sheet l Nov. 30,1943. c. T. BOUGHTON ET AL 2,335,232

UPWARDLY OPENING SAFE Nov. 30, 1943. c. T. BOUGHTON ET AL. 2,335,232

Nov. 30, 1943.

c. 'r BOUGHTON ET AL UPWARDLY OPENING SAFE Filed Jan. 10. 1942 7Sheets-Sheet 6 Patented Nov. 30, 1943 UPWARDLY OPENING SAFE Cecil T.Boughton, Canton,

North Canton, Ohio, assignors & Lock Company, Canton, Ohio,

of Ohio and Karl H. Miller, to Diebold Safe a corporation ApplicationJanuary 10, 1942, Serial No. 426,314

13 Claims.

The invention relates to upwardly opening safes, and more particularlyto heat resisting safes including walls forming a compartment having anupwardly opening doorway, an upwardly opening door, and preferablyelevator means actuated by the opening and closing of the door adaptedfor raising and lowering an article holder for valuables, usuallydocuments such as record cards, record sheets, signature cards, and thelike, from a position within the safe compartment when the door isclosed to a position convenient for use above the safe compartment whenthe door is open, and for lowering the article holder and valuables backinto the compartment upon closing the door.

Such a safe is set forth in United States Letters Patent No. 2,003,302of William C. Miller and Albert L. Abbott for Safe structure, and thepresent invention includes improvements of the upwardly opening safe ofsaid patent.

The door opening and closing means of said patent includes a fluidactuated vertically movable lift, the fluid actuating means for whichincludes a pair of hydraulic rams having cylinders mounting pistonswhose upper ends are secured to the lift, a reservoir for the fluid,preferably oil, for operating the rams, a pump for drawing the oil fromthe reservoir and forcing the oil through conduits leading to the lowerends of the cylinders of the rams, an electric motor for operating thepump, and an electric circuit for operating the motor including anormally open starting switch, a normally open electro-magneticallycontrolled stick circuit switch, a normally closed stop switch, anormally closed limit switch, a normally open lock controlled switch,and when the safe contains file drawers, normally closed file drawercontrolled switches.

In the safe of said patent, the electric motor drives the pump to pumpthe oil to the rams to cause the lift to elevate the door to the upperend of its movement in effecting either the opening or the closing ofthe door.

When the upper end of reached the circuit of the motor is automaticallyinterrupted by the limit switch after which the door lowers itself bygravity either to a position at the rear of the compartment when thesafe is opened or to the closed position in the doorway.

As the lift lowers, the oil is forced out of the lower ends of thecylinders of the rams back through a regulator valve into the reservoir,the regulator valve including a variable opening for the door movementis Ill) controlling the rate of lowering or settling of the door.

Also, in said patent the lock controlled switch or circuit breaker isnormally held open by the bolt work of the door locking mechanism untilthe bolt work is released to permit the door to be opened.

'The normally open starting switch when momentarily closed, closes thecircuit of the electromagnetically controlled stick circuit switch. Thenormally closed stop switch operates to stop the motor at any instant byopening the stop switch. When file drawers are contained in the safecompartment, the drawer controlled switches therefor must all be closedbefore the motor can operate.

The general construction and arrangement and the operatingcharacteristics of the safe of said patent'have proven to be verysatisfactory in use, but the fluid actuating means for the door lift arerelatively difiicult and expensive to manufacture, and are subject tooperating difiiculties usual with fluid actuated devices, such asclogging of the oil conduits by dust and dirt, excessive oil leakagepast the pistons, unequal flow of oil to both rams with a consequentoverloading of one ram, and the like.

The objects of the present invention include the provision of a safehaving all the desirable characteristics of said U. S. Patent No.2,003,302, and including electric motor driven mechanical actuatingmeans for the vertically movable lift, the mechanical actuating meansbeing of such nature as to enable more simplified and economicalmanufacture than the fluid actuating means for the. lift of said patent,and being adapted for more satisfactory operation.

Further objects of theinvention include the provision of an electricmotor driven mechanical lift including a pair of raising and loweringmembers arranged for simultaneous equally distributed power raising andlowering.

Further objects of the present invention include the provision of animproved electric motor driven mechanical lift including twosimultaneously operating raising and lowering members, and which issimplified in construction and in the arrangement and cooperation of itsparts, so that the lift may be manufactured and maintained with facilityand economy, and so that at the same time the lift is capable ofoperating with ease and certainty.

lihe foregoing and other objects are attained by the upwardly openingsafe, and electric motor driven mechanical lift therefor, apparatus,parts, improvements, combinations, and sub-combinations, which comprisethe present invention, and the nature of which is set forth in thefollowing general statement, and preferred embodiments of which togetherwith their mode of use are set forth in the following description, andwhich are particularly and distinctly pointed out and set forth in theappended claims forming part hereof.

The nature of the present invention may be stated in general terms asincluding walls forming a safe body having an upwardly opening doorway,a door arranged for guided movement to and from a fitting and closingposition in the doorway, and improved lift means preferably hingeconnected with one edge of the door for effecting raising and loweringmovement of the door, the lift means including a pair of spacedmechanical jack means, preferably screw jack means, each jack meansincluding a raising and lowering member preferably a rotary jack screw,a bridge extending lengthwise between the spaced jack means, and thebridge having ends secured to the raising and lowering members of thejack means. Preferably reversing electric motor drive means are locatedon the bridge, and preferably sprocket wheel and endless chain beltmeans providing a power drive connection between the electric motordrive means and the preferred rotary screw jack raising and loweringmembers of the jack means.

The improved safe furthermore preferably includes an improved electriccircuit for controlling the operation of the motor, and also includesfurther improved details of construction and arrangement set forthhereinafter, and also preferably includes other parts as set forth insaid U. S. Patent No. 2,003,302.

Preferred embodiments of the improvements are illustrated, by way ofexample, in the accompanying drawings forming part hereof, in whichFigure 1 is an isometric view of an upwardly opening safe including theimprovements, with the hood removed of the improved electric motordriven mechanical lift, the lift being in its extreme lower position andthe door hinge connected at its rear edge to the lift being in itsclosed position in the upwardly opening doorway;

Fig. 2, a similar isometric view, with the lift in an intermediateposition between its extreme lower and upper positions and the doorhinge connected to the lift in its concurrent intermediate positionbetween its closed position and its extreme upper position;

Fig. 3, a top plan view of the safe, with its parts in. their relativepositions when the door is closed, and withthe hood for the liftremoved, as in Fig. 1;

Fig. l, a rear vertical sectional View thereof as on line 44, Fig. 3,with the hood for the lift in place;

Fig. 5, a transverse sectional view thereof as on line 5--5, Fig. 3,with portions broken away and shown in section;

Fig. 6, a fragmentary transverse sectional View similar to Fig. 5, butshowing the parts in thei relative positions when the lift and the doorare in intermediate positions, as shown in Fig. 2;

Fig. '7, a fragmentary view similar to Figs. 5 and 6, showing the partsin their relative positions when the lift and the door are in theirextreme upper positions;

Fig. 3, a view similar to Figs. 5, 6, and 7, showing the parts in theirrelative positions when the lift and the door are in their extreme lowerpositions at the of the safe compartment, and

with the article holder in its extreme upper posi-.

tion, enabling access to and use of the articles contained in thearticle holder;

Fig. 9, a diagrammatic view illustrating the circuit of the electricmotor driving the mechan ical lift; and

Fig. 10, a fragmentary front elevation view showing the preferred leveroperated stop switch for the drive motor of the safe, and the mountingof the stop switch on the safe body.

Similar numerals refer to throughout several views.

The improved upwardly opening safe is indicated generally by l 8 and hasan external appearance and many parts generally similar to orsubstantially the same as the safe illustrated in said U. S. Patent No.2,003,302, and such parts will only be described briefly herein.

The illustrated safe it includes a composite safe body indicatedgenerally by Hi and having an inner five-walled upwardly opening sheetmetal compartment indicated generally by l l, and a five-walledmonolithic heat and fire resisting shell indicated generally by i2enclosing the inner compartment l I, the shell being provided withtension reinforcing means indicated generally by 43. and the compartmentand shell being enclosed in an external five-walled interlocking sheetmetal case indicated generally by M.

Each of the five-walled structures preferably comprises five sides of asix-sided preferably rectangular polyhedron, the sixth upper side ofwhich is open.

A door frame indicated generally by [5- connects the opening of theinner compartment II with the opening of the outer case I4 and forms aclosure for the outer end of the monolithic shell 2 2. A door indicatedgenerally by It forms a closure fitting the door frame, and the door anddoor frame are provided with usual interfitting tongues and grooves toform an effective flame and heat resisting joint between the door andthe door frame when the door is in the closed position, and thus alsoproviding a sealing closure for the upper sixth side of the compositesafe body I0 and its compartment H and shell 52 and case M.

The door i6 as illustrated includes an outer shell it of formed metalsheets, the interior of which is filled with heat resisting material l9which is provided with tension reinforcing means rill.

A tray or article holder indicated generally by 25 is arranged for beinglowered into and raised from the compartment II of the safe body id, asshown by elevator means indicated generally by 22 operatively interposedbetween the article holder 2i and the safe body 50. The article holder25 and the elevator means 22 and their relationship with each other andthe compartment H are substantially identical with those set forth insaid U. S. Patent No. 2,003,302.

For the purposes of the present improvements, it need only be statedthat the article holder 2| has mounted at each end thereof a pair oflaterally spaced upwardly and downwardly extended articulated racks eachindicated generally by 23.

Interposed between each end of the article holder 25 and the oppositeend wall of the compartment H, a horizontally extending shaft 24 has itsforward end journalled in a suitable bearing 25 mounted in the frontwall of the compartment l l, and the rear end of the shaft 24 extendsthrough and is journalled in bearing means indicated generally by 26extending similar parts through the rear walls of the compartment l I,the shell l2, and the case l4.

On the shaft 24 within the compartment H a pair of pinions 21 aresecured, each of which meshes with one of the articulated racks 23.

The composite safe body It as shown is supported upon a base frameindicated generally by 28, and a lift housing indicated generally by 29is located at the rear of the safe body l.

Within the lift housing 2% the rear end of each shaft 2-5 has securedthereon a sprocket wheel 30.

The base frame 28 includes a rear wall 3! alined with the rear wall ofthe case Hi, and preferably vertically below each sprocket wheel 30, asprocket wheel 32 is journalled on a bearing post 33 secured on the baseframe rear wall 3|.

An endless chain belt 54 extends about each set of vertically spacedsprocket wheels 32 and 3G, and a horizontally extending elevator bar 35is located in the housing 29 at the rear of the chain belts 3 3, and ateach end the bar 35 is secured by a bracket 36 with the outer verticalline of links of one of the chain belts 34. The elevator bar 35 as shownis an angle bar having an upper horizontal flange at opposite ends ofwhich above the brackets 36 are secured striker blocks 3'! for contactwith the lower edge of the door as it is being lowered into or raisedfrom the housing 29, as hereinafter set forth in detail.

The article holder elevator means of the present improvements isgenerally similar to but differs from the elevator means of said U. S.Patent No. 2,003,302 in the use of two separate chain belts 34 for thetwo sets of sprocket wheels 39 and 32 which operate the parallelhorizontal shafts 24, whereas in said patent, an endless chain and barlinkage having central crossing portions are extended around and operatethe similar sprocket wheels.

The operation of the elevator means 22 of the present improvements isthe same as the operation of the elevator means of said patent, that iswhen the elevator bar 35 is lowered, the shafts 24 are rotatedsimultaneously. Assuming the article holder 2! to be in its lowermostposition in the'compartment ll, when the elevator bar 35 is lowered, theshafts 24 are rotated to raise the article holder 2!, and vice versa.

On the outer top border of each end wall of the safe body it), aforwardly and rearwardly extending track fill is located, each track 48being spaced endwise from the adjacent end edge of the door. At eachfront corner of the door, a bracket ti mounts a cantilever stub shaftjournaling a roller d2 rolling on the adjacent track (it. At each rearcorner of the door It a hinge bracket d3 is secured.

The lift housing 29 has an open upper end and has operatively mountedtherein improved lift means indicated generally by M which includes ateach end of the housing it screw jack means indicated generally by M andincluding an upright jack tube #5 whose lower end preferably fits and issecured in and supported by a base socket it which in turn as shown issupported upon and secured within the bottom wall of a base pan ll ofthe housing it, the base pan 41 in turn as shown being supported upon ahorizontal base plate 43 forming part of the base frame 28.

The housing 29 extends a substantial distance above the top of the safebody it, and each jack tube 55 terminates between the top of the housing 29 and the top of the safe body It.

At the upper end of each preferably cylindric jack tube is secured ajack nut 49, and an elongated rotary jack screw is screwed in each jacknut 49.

Each jack screw 56 has an upper shaft end at extending beyond the upperend of the threads of the jack screw and is mounted by a double thrustand journal bearing means indicated generally by 52 in a bracket andhousing unit indicated generally by 53.

Each bracket and housing unit 53 includes a hinge bracket 54 extendingvertically at one side of one of the hinge brackets til at one of therear corners of the door it, and each set of hinge brackets 43 and 5dare hinge connected with each other by a hinge pin 55 whose axis extendsparallel with the rear longitudinal edge of the door it and is offsetrearwardly therefrom in the usual manner.

Each bracket and housing unit '53 also includes a bridge bar connectingbracket 56 extending horizontally from the bottom of the one unit 53towards the bracket 56 of the opposite unit 53 on the other jack screw50.

A bridge bar 5'1 extends lengthwise between the bracket and housingunits and the ends of the bridge bar 5i are secured to the brackets 55of the units 53 as by bolt and nut means 58.

The upper shaft end 5! of each jack screw extends above its associatedbracket and housing unit 53 within which it is bearing mounted, andabove each unit 53 each jack screw shaft end 5! has a sprocket wheel 59secured thereon.

As shown, centrally located on the bridge bar 5'! is mounted a reversingelectric drive motor and reduction gear unit indicated generally by if?for the improved lift means 44.

The motor and reduction gear unit Ell includes a vertically extendingdrive shaft of having a pair of vertically spaced sprocket wheels 52secured thereon, and each sprocket wheel 62 and one of the sprocketwheels 59 are operatively connected by an endless chain belt '53.

The improved lift means id furthermore in cludes a guide channel 64located between each jack means A l and the adjacent end wall of thehousing and the upper end of each guide channel 84 is secured to thebracket and housing unit 53 carried on the upper end of the screw of itsassociated jack means. The flanges of each guide channel 5- 5 extendabout its associated jack means towards the flanges of the other guidechannel E l At each end of the housing 29, walls form verticallyextending slide guides 65 for each guide channel 84, and the improvedlift means M is furthermore preferably reinforced by a rear plate 65extending between and connected to the rear flanges of the guidechannels 65.

Operatively associated with the safe body Iii and the lift housing 29,at each rear corner of the safe body It, track switch i is locatedincluding a forwardly opening groove track 68 having its front endalined with one of the upper tracks All on the safe body iii. I Thegroove track 58 communicates at it inner end with a vertical groovetrack fit! which also communicates with a rearwardly and downward-- 1yextending groove track it. A switch lever ll is operatively mountedbetween the groove tracks 63 and H3 at the lower end of the verticalgroove track 69 for automatic actuation by the associated roller 42 onthe front edge of the door.

The lower end of each track groove lil cornmunicates with the upper endof a channel track 70' located in the housing 29.

Each track switch Bl is similar in construction and operation to thetrack switches of said U. S. Patent No. 2,003,302, and one of the trackswitches 57 is arranged for automatically actuating a reversing switchindicated diagrammatically in Fig. 9 in a manner similar to theoperation of the limit switch of said patent.

In the safe 50, the door is provided with bolt work controlled by acombination lock indicated generally by 12, and the bolt work may be andpreferably is associated with a lock controlled switch, as in saidpatent.

Likewise the safe l may be provided with drawer controlled switches whenits article holder 2i is provided with drawers, as in said patent.

In the operation of the improved safe, when the article holder 2| is inthe compartment H and the door it is closed as in Figs. 1, 3, 4, and 5,closing the normally open starting or raising switch it: serves tooperate the motor and reduction gear unit 60, and causes the sprocketwheels 62 and sprocket wheels 59 and their endless chain belt 63 torotate the jack screws 50 in the stationary jack nuts 68 raising thejack screws and their bracket and housing units 53 hinge connected withthe door it, thereby raising the door it through the intermediateposition shown in Figs. 2 and 6 to the extreme upper position of thejack screws and door, shown in Fig. '7, at which the reversing switch 14is automatically actuated by one of the track switches 61 to causereverse rotation of the motor 60 and lowering of the door E6 to itsextreme lower position 8, the lowering of the door serving to actuatethe elevator means 22 to raise the article holder 21 to the position foruse shown in Fig. 8.

In the preferred wiring as shown diagrammatically in Fig. 9, theelectric power supply line for the motor 60 includes two main conductors75 and 15. As illustrated the conductor 16 extends to the centralterminal ll of the motor 60 through series connected switches, asfollows: an overload circuit breaker switch 79, and a plurality ofdrawer switches 80, the article holder 2! usually being provided with aplurality of drawers, as in U. S. Patent No. 2,003,302. r I

The other main power supply line 75 has a branch 15-! which has seriesconnected therein the starting or raising switch 73, the bolt workswitch 8!, the coil of the magnetic reversing relay B2 and a returntherefrom to the line of the conductor 76 at a junction 83 beyond thedrawer controlled switches 80.

The branch 'l5l has a second branch 15-2 in which is series connectedone set of contacts 84 of the relay 82, the reversing switch 74 and thelowering switch 85 terminating in a junction at 85 with the branch 15-4between the raising switch 73 and the lowering switch 85.

The main conductor 15 has another branch 15-3 which itself has onebranch l4 in which is series connected another set of contacts 8'!closed and opened simultaneously with the contacts 8 of the relay 82,the branch 75- 3 extending from the contacts 8? to one outer terminal 88of the motor one of the motor windings being connected between theterminal 38 and the terminal ll.

Another branch l'5-5 the main conductor 15 therein the set of contactswhich are opened and closed of the branch l5-3 of has series connected189 of the relay 82 as shown in Fig.

18, an emergency stop reversely to the sets of contacts 84 and 81, andfrom which the branch 75-5 extends to the other outer terminal 99 of themotor 60 with a stop switch 9| series connected therein. I

In the diagram of Fig. 9, the various switches are shown in theirpositions when the door It is in closed position. Each of the drawerswitches and the bolt work switch 3i are safety switches and must beclosed to permit raising of the door. The drawer switches are closedwhen the drawers are closed, and the bolt work switch is closed when thebolt work is retracted.

The lowering switch S5 is normally closed, and the stop switch 9 l,located as shown on the upper right hand rear corner of the safe body asviewed from the front, is closed except when held open by the actuator92 secured on the right hand door hinge bracket 43.

The stop switch 9i has a downwardly extending operating lever 93, andthe actuator 92 has two actuating blades 9d and 95 at right angles toeach other, one of which presses the lever 93 to hold open the stopswitch 9i as and when the door [5 reaches either the fully closed orfully open position.

When the raising switch 73 is momentarily closed from its normally openposition, the coil of the relay 82 is energized actuating its armatureto close the sets of contacts 8 3 and 81 and to produce through contacts8 3, and switches 74 and 85 another connection of one terminal of therelay coil with the main conductor 15, the other coil terminal beingstill connected to the main conductor 76, thereby continuing to energizethe relay coil.

At the same time the conductor 75 is in a connected circuit through therelay contacts 87 with the motor terminal 88, and the main conductor 16is in a connected circuit through the circuit breaker 73, the emergencystop switch 79, and the drawer switches 89 with the intermediate motorterminal Tl, and the motor operates to raise the jack screws and door.

When the door it reaches its extreme upper position, the track switch 67operates through the plunger 96, as set forth in U. S. Patent No.2,003,302, to open the reverse switch it, and deenergize the coil of therelay 82.

The relay armature returns to the position shown in Fig. 9, with thecontacts 89 closed, and the stop switch 9| 'now being closed, the motorterminal 90 is connected with main conductor 75, and the motor terminalll still being connected with the main conductor it, the motor reversesto lower the jack screws and door.

If the relay contacts should stick, the plunger 96 would continuedownwardly and open the emergency stop switch 79, stopping the motor.

If during any raising movement of the screw acks, it is desired toreverse the motor manually door nears and reaches the fully openposition the actuating blade Sid opens and holds open the stop switchti, and when the door reaches thefully closed position the actuatingblade opens and holds open the stop switch 95.

The use of the lever operated stop switch 9! alternately actuated by theblades iiiand 95 of the actuator $2 secured to the right hand door hingebracket 23, permits the single stop switch 9! to be used for stoppingthe motor iii as and when the door reaches both the fully open and fullyclosed position, and also provides for coasting the motor since theblades 94' and 95 slide over the lever 93 of the stop switch 9| afterhaving actuated the lever to open the stop switch 9 I.

When the door has reached its fully open position, and it i desired toclose the door, the normally open starting or raising switch 13 isclosed momentarily, and the door is automatically raised and lowered tothe closing position, it being noted that for both opening the door andclosing the door, the screw jacks first raise and then lower after theautomatic actuation of the reverse switch 14 by the track switch 61.

The embodiments of the present improvements illustrated and describedherein are by way of example, and the scope of the present invention isnot limited to the same or to the particular details thereof, but iscommensurate with any and all novel subject matter contained hereinwhich may at any time properly under the United States patent laws beset forth in the claims hereof, or originating herein, and the elementsof any such claims are intended to include their reasonable, functionaland structural equivalents.

We claim:

1. In a safe and the like, a body having an inner compartment and. anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift meanshaving an operative connection with the door for effecting the guidedmovement of the door, the lift means including spaced mechanical jackmeans having raising and lowering members included in the operativeconnection of the lift means with the door, and electric motor drivemeans carried by the raising and lowering members for operating the jackmeans for simultaneously moving the raising and lowering members.

2. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift means andhinge means operatively connecting the lift means with the door foreffecting the guided movement of the door, the lift means includingspaced mechanical jack means having raising and lowering membersincluded in the hinge connection of the lift means with the door, andelectric motor drive means carried by the raising and lowering membersfor operating the jack means for simultaneously moving the raising andlowering members.

3. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift meanshaving an operative connection with the door for effecting the guidedmovement of the door, the lift means including spaced mechanical jackmeans, each jack means including a raising and lowering member, a bridgeextending lengthwise between the spaced jack means, the bridge havingends secured to the raising and lowering members of the jack means, anelectric motor on the bridge, and power drive connecting means betweenthe electric motor and the jack means for operating the jack means forsimultaneously moving the raising and lowering members.

4. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift means andhinge connecting means between the lift means and the door for effectingthe guided movement of the door, the lift means including spacedmechanical jack means, each jack means including a raising and loweringmember, a bridge extending lengthwise between the spaced jack means, thebridge having ends secured to the raising and lowering members of thejack means, an electric motor on the bridge, and power drive connectingmeans between the electric motor and the jack means for operating thejack means for simultaneously moving the raising and lowering members.

5. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift meanshaving an operative connection with the door for effecting the guidedmovement of the door, the lift means including spaced screw jack means,each jack means including a raising and lowering rotary jack screw, eachscrew having journalled thereon a member included in the operativeconnection of the lift means with the door, and electric motor drivemeans carried by the journalled members for simultaneously rotating thejack screws.

6. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift means andhinge connecting means between the lift means and the door for effectingthe guided movement of the door, the lift means including spaced screwjack means, each jack means including a raising and lowering rotary jackscrew, each screw having journalled thereon a member included in thehinge connecting means between the lift means and the door, and electricmotor drive means carried by the journalled members for simultaneouslyrotating the jack screws.

'7. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift meanshaving anoperative connection with the door for effecting the guidedmovement of the door, the lift means including spaced screw jack means,each jack means including a raising and lowering rotary jack screw, eachscrew having journalled thereon a member included in the operativeconnection of the lift means with the door, a bridge extendinglengthwise between the journalled members, the bridge having endssecured to the journalled members, an electric motor on the bridge, andpower drive connecting means between the electric motor and the jackmeans for simultaneously rotating the jack screws.

8. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift means andhinge connecting means between the lift means and the door for effectingthe guided movement of the door, the lift means including spaced screwjack means, each jack means including a raising and lowering rotary jackscrew, each screw having journalled thereon a member included in thehinge connecting means between the lift means and the door, a bridgeextending lengthwise between the an electric motor journalled members,the bridge having ends secured to the journalled members, an electricmotor on the bridge, and power drive connecting means between theelectric motor and the jack means for simultaneously rotating the jackscrews.

9. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift meanshaving an operative connection with the door for efiecting the guidedmovement of the door, the lift means including spaced screw jack means,each jack means including a raising and lowering rotary jack screw, eachscrew having journalled thereon a member included in the operativeconnection of the lift means with the door, a bridge extendinglengthwise between the journalled members, the bridge having endssecured to the journalled members, on the bridge, and sprocket wheel andendless chain belt power drive connecting means between the electricmotor and the jack means for simultaneously rotating the jack screws.

'10. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to and from a closing position in the doorway, lift means andhinge connecting means between the lift means and the door for effectingthe guided movement of the door, the lift means including spaced screwjack means, each jack means including a raising and lowering rotary jackscrew, each screw having journalled thereon a member included in thehinge connecting means between the lift means and the door, a bridgeextending lengthwise between the journalled members, the bridge havingends secured to the journalled members, an electric motor on the bridge,and sprocket wheel and endless chain belt power drive connecting meansbetween the electric motor and the jack means for simultaneouslyrotating the jack screws. Y

11. In a safe and the like, a body having an inner compartment and anupwardly opening doorway for the compartment, a door arranged for guidedmovement to'and from a closing position in the doorway, lift meanshaving an operative connection with the door for effecting the guidedmovement of the door, the lift means including spaced mechanical jackmeans, each jack means including a raising and lowering member, a bridgeextending lengthwise between'the spaced jack means, the bridge havingends secured to the raising and lowering members of the jack means, anelectric motor on the bridge, and power drive connecting means betweenthe electric mo tor and the jack means for operating the jack means forsimultaneously moving the raising and lowering members, and slide guidemeans for the jack means, each slide guide means including a movableslide member secured to one of the raising and lowering members and anadjacent stationary guide member.

12. In a lift adapted for moving a guided door and the like to and froma closing position in an upwardly opening doorway of a compartment bodyand the like, spaced screw jack means, each jack means including araising and lowering rotary jack screw, each screw having journalledthereon a member adapted for operative connection with the door and thelike to'be moved, and electric motor drive means carried by thejournalled members for simultaneously rotating the jack screws.

13. In a lift adapted for moving a guided door and the like to and froma closing position in an upwardly opening doorway of a compartment bodyand the like, spaced screw jack means, each jack means including araising and lowering rotary jack screw, each screw having journalledthereon a member adapted for operative connection with the door and thelike to be moved, a bridge extending lengthwise and having ends securedto the journalled members, an electric motor on the bridge, and powerdrive connecting means between the electric motor and the jack means forsimultaneously rotating the jack screws.

CECIL T. BOUGHTON. KARL H. MILLER.

